1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Citrus2011 [14]
2 years ago
13

Element X is a radioactive isotope such that every 66 years, its mass

Mathematics
1 answer:
LenKa [72]2 years ago
3 0

Answer:

194.5315427 grams

Step-by-step explanation:

The half-life of element x would be 66 years. So, after 20 years you would have:

.5^(20/66) x 240=0.810548 x 240

        =194.5315427 grams of the element left ......

You might be interested in
Which pair of angles shares Ray AG as a common side
Anastaziya [24]
BAF and FAD is the answer
4 0
3 years ago
What is the equation of the line perpendicular to 3x+y= -8that passes through -3,1? Write your answer in slope-intercept form. S
Gekata [30.6K]

Slope intercept form of a line perpendicular to 3x + y = -8, and passing through (-3,1) is y=\frac{1}{3} x+2

<u>Solution:</u>

Need to write equation of line perpendicular to 3x+y = -8 and passes through the point (-3,1).

Generic slope intercept form of a line is given by y = mx + c

where m = slope of the line.

Let's first find slope intercept form of 3x + y = -8

3x + y = -8

=> y = -3x - 8

On comparing above slope intercept form of given equation with generic slope intercept form y = mx + c , we can say that for line 3x + y = -8 , slope m = -3  

And as the line passing through (-3,1) and is  perpendicular to 3x + y = -8, product of slopes of two line will be -1  as lies are perpendicular.

Let required slope = x  

\begin{array}{l}{=x \times-3=-1} \\\\ {=>x=\frac{-1}{-3}=\frac{1}{3}}\end{array}

So we need to find the equation of a line whose slope is \frac{1}{3} and passing through (-3,1)

Equation of line passing through (x_1 , y_1) and having lope of m is given by

\left(y-y_{1}\right)=\mathrm{m}\left(x-x_{1}\right)

\text { In our case } x_{1}=-3 \text { and } y_{1}=1 \text { and } \mathrm{m}=\frac{1}{3}

Substituting the values we get,

\begin{array}{l}{(\mathrm{y}-1)=\frac{1}{3}(\mathrm{x}-(-3))} \\\\ {=>\mathrm{y}-1=\frac{1}{3} \mathrm{x}+1} \\\\ {=>\mathrm{y}=\frac{1}{3} \mathrm{x}+2}\end{array}

Hence the required equation of line is found using slope intercept form

4 0
3 years ago
Match the part of the circle with the term that best describes it.​
nordsb [41]
GH: chord
M: point of tangency
MJ: diameter
J: center
MH: radius
GH: secant
6 0
2 years ago
a 46 inch piece of Steel is cut into three pieces so that the second piece is twice as long as the first piece and third piece i
Natasha2012 [34]
X,2x,6x+1=46
(46-1)/5
x=5
5,10,31
4 0
3 years ago
Is 6/3 &gt; 8/3?
Novay_Z [31]
No 8/3 is greater because if you turn them into mixed numbers 6/3 would be 2 and 8/3 would be 2 1/2
7 0
3 years ago
Other questions:
  • Bryce has 135 feet of rope. He wants to cut it into pieces that are each 9 feet long. How many pieces of rope will Bryce have?
    10·2 answers
  • Find the range of possible measures for the third side of a triangle is the first two sides are 9 and 9.
    9·1 answer
  • the surface areas of two similar solids are 1008cm^2 and 1372ccm^2. the volume of the larger solid is 1801cm^3 find the volume o
    11·1 answer
  • For the year 2010, 33% of taxpayers with adjusted gross incomes between $30,000 and $60,000 itemized deductions on their federal
    11·1 answer
  • Please help.<br> Algebra.
    11·1 answer
  • What is the result of subtracting the second equation from the first? <br> -4x-2y=-2<br> x-2y=9
    12·1 answer
  • Anyone wanna be friendsssssss
    9·1 answer
  • Given sin (-∅) = -1/4 and tan∅ = √15/15.<br> What is the value of cos∅?
    13·1 answer
  • Find the surface area of the pyramid <br> 12 ft<br> 6 ft<br> 5.2 ft
    10·1 answer
  • Can someone help me out with this problem
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!